nPM1100 - heavy-duty load in parallel to battery

RE: nPM1100 - heavy-duty load in parallel to battery

ketiljo — Tue, 30 Nov 2021 14:07:15 GMT

This will be IBAT_LIM:https://infocenter.nordicsemi.com/topic/ps_npm1100/chapters/charger.html#electrical_param

RE: nPM1100 - heavy-duty load in parallel to battery

Dom O — Tue, 30 Nov 2021 13:04:09 GMT

Thank you! Exactly the advice I needed.

BTW - I can't see the 600mA VSYS value in the documentation.

RE: nPM1100 - heavy-duty load in parallel to battery

ketiljo — Fri, 26 Nov 2021 11:48:44 GMT

The nPM1100 is not designed to handle the load in parallel with the battery.
The reason this is not allowed is that the battery charger is self-checking during the charge cycle and will produce an internal error if the battery voltage is dropping. (See section 6.2.8)
If you know for sure that the load will not be switched ON/OFF on during the charging cycle, then you can connect it directly to the battery

We recommend the load to be connected to VSYS, keeping in mind there is a limitation of max 600 mA from the battery